Water-cooled furnace-door.



PATENTED MAY 9, 1905.

No. '789,550y

L. L. KNOX.

WATER COOLED FURNAOE DOOR.

APPLICATION FILED MAY 23,1904.

WITNESSES INVENTBR NITED STATES Patented May 9, 1905.

PATENT OEEIcE.

LUTHER L. KNOX, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- WEISKOPF,

WATER-COOLED FURNACE-DOOR.

SPECIFICATION forming part of Letters Patent No. r789,550, dated May 9, 1905.

Application tiled May 23, 1904. Serial No. 209,199.

To all whom t may concern.'

Be it known that I, LUTHER L. Knox, of Pittsburg, Allegheny county, Pennsylvania, have invented new and useful VVater-Oooled Furnace-Doors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, formf ing part of this specification, in wl1ich-- Figure 1 is a front elevation of my improved door. Fig. 2 is a top plan view of the same. Fig. 3 is a cross-section on the line 111111 of Fig. 1. Fig. Atis a vertical central section, and Fig. 5 is a partial vertical section of the outlet corner portion.

My invention relates to the class of watercooled furnace-doors, and is designed to provide a simple and eiiicient construction which may be cast in one piece and provide for the water-cooling of the door and its cheeks.-

In the drawings I show the hollow doorbody 2 as provided with inwardly-projecting integral hollow cheek portions 3 3, a hollow integ'ral top rail 4, and a hollow integral bottom rail 5. The cheeks and rails project inwardly from the door-body and afford an inclosed cavity to receive refractory brick, which covers the inner face of the body. The side cheeks are separated from the cavity of the body by the partitions 6 6, these partitions being preferably inclined inwardly, as shown in Fig. 3. The inner wall 7 of the top rail is also preferably inclined inwardly and downwardly to bind the brick in place. The bottom rail is cut off from the body by the partition 8, which eX- tends to the lower edge of the side partitions 6. The partitions 6 and 8 are extended forwardly to cut off the body from the cheeks, as shown at 6 and 8', and the partitions 6 and 6 extend from the ends of the partitions 8 8 upwardly to the closed top 9 of the door. rlhe water is led into one of the cheeks by the pipe 10, which screws into the top of the cheek 3 of the door at one side and thence flows down through this cheek across through the lower sill 5 and thence up through the other cheek 3. Near the top of this other cheek a cross-partition 11 extends from the front rearwardly the thickness of the doorbody and connects to a vertical partition 12, which leads up to the closed top and cuts oil the water from the door-body. The water flows back under this cross-partition 11 into the cheek proper and thence Hows across through the top rail 4, from which it passes through a cored hole 13 into the hollow body 2. It then flows downwardly through this body to a point below the vertical partition 14 and rises through the other half of the door-body, passing out through an outletpipe screwed into the hole 15.

I have shown the door as provided with a peep-hole 16 and guides 17 for its cover. The connecting hole 13 is flush with the top of the door, so that any steam collecting may pass out through the open top of the body proper in front of the closed top rail. The partition 1li extends down to the peep-hole and compels the water to pass down to the bottom of the door-body before rising and .passing to the outlet. I show small cored holes closed by screw-plugs 18 for removing the sediment from the door-body and lower rail.

The advantages of my invention result from the circulating of the water through the rails and cheeks before entering the body, thus first coolingI the parts subjected to the highest heat, the body proper being shielded by the brick, also from the construction of the door, which allows it to be cast in one piece, and the provision for the escape of steam from the open top of the body proper.

The dooris preferably formed either of copper or an alloy containing a high percentage, preferably ninety-eight per cent. or above, of copper. Copper, or this high alloy thereof, will not crack under heat, and it also enables the door to be made much lighter than where f cast-iron is used.

Many variations may be made in the form and arrangement of the door, the partitions, &c., without departing from my invention.

I claimv 1. A hollow Water-cooled door having inward]y-projeoting hollow cheeks and rails and baiiles arranged to circulate the water through the cheeks and lower rail before it passes to the body; substantially as described.

2. A hollow water-cooled door having a top rail with a closed top, the body proper having an open top, and connections arranged to circulate the water through the rail and body; substantially as described.

3. A hollow water-cooled door having hollow cheeks and rails, the top rail having a closed top and the body having an open top, with connections arranged to circulate water through the body, the rails and the cheeks; substantially as described.

4. A door having a hollow body, hollow cheeks and rails cut olf from the body by partitions, awator connection between the upper rail and body, and means for circulating the water {irst through the cheeks and rails and then through the body; substantially as described.

5. A door having a hollow body, hollow cheeks and rails cut oli`l from the body by' partitions, water connections between the upper rail and body, and means Vfor circulating the water l'irst through the cheeks and rails and then through the body, said body having an open top; substantially as described.

6. A hollow water-cooled door cast in one piece, with an upper rail having a closed top and a body having an open top; substantially as described.

7. A hollow door cast in one piece havinga hollow body, hollow cheeks and rails projecting inwardly and separated from the body by partitions, a water connection between the body and rails, and rneans for circulating the water first through the rails and cheeks and then through the body; substantially as described.

8. A hollow door havingahollow body, hollow cheeks and a hollow rail, said parts being cast in one integral piece, and integral partitions projecting' from the walls and at least partially cutting off the cheeks from the hollow body; substantially as described.

In testimony whereotl l have hereunto set my hand.

LUTHER L. KNOX.

lvitnesses:

H. M. CoRwIN, JOHN MILLER. 

